Drafting instrument.



Patented July 18, 1916.

INVENTOR NIIS Paulsen WITNESSES A YTORNEYS' UNITED STATES PATENT onrion.

NILS PAULSEN, OF NEW YORK, N. Y.

DRAFTING INSTRUMENT.

Specification of Letters Patent.

Application filed August 9, 1915. Serial 'No. 44,545.

To all whom it may concern; 7

Be it known that I, NILs PAULSEN, asubject of the King of Norway, and a resident of the city of New York; borough of Manhattan, in the county and State of New York, have invented anew and Improved Drafting Instrument, of which the following is a full, clear, and exact description.

This invention relates to a drafting instrument, and has 'to deal more particularly with that class of instruments by which parallel lines can be simultaneously drawn.

The invention has for its general object to improve the construction of devices of the character referred to whereby straight or circular parallel lines may be simultaneously drawn, the instrument being of light and compact form and including a plurality of marking elements which are readily adjust able to and from operative position and capable of being set to make lines any desired distance apart.

A more specific object of the invention is the provision of an instrument consisting of a plurality of. spaced parallel beams each having one or more adjustable marking devices for enabling parallel lines to be drawn, the marking devices being adjustable longitudinally of the beams for the proper spacing of the lines, and capable of being swung on their respective beams to one side or the other, so as to be out of the way when not needed.

lVith such objects in View, and others which will appear as the description proceeds, the invention comprises various novel features of construction and arrangement of parts which will be set forth with particularity in the following description and claims appended hereto.

In the accompanying drawing, which illustrates one embodiment of the invention and wherein similar characters of reference indicate corresponding parts in all the views, Figure 1 is a sectional view on the line 11, Fig. 2, with portions broken away to show the details of construction; Fig. 2 is a plan view; Fig. 3 is a detail sectional view on the line 33, Fig. 2, drawn on-a reduced scale; and Fig. 4 is a perspective view of the guide shoe adapted to be used when straight lines are to be drawn.

Referring to the drawing, 1 designates the central or main beam of the instrument, and 2 are the parallel beams disposed at opposite sides of the central beam 1. These beams are kept in proper spaced and parallel relation by passing through openings 3 in cross bars 4. The beams are preferably made hollow so as to be light and the ends may be closed by screw. plugs 5. On the beams are arranged marking devices 6, there being one or. more on each beam. 011 the central beam is a guide or pivot element 7 applied to one end, and at the opposite Patented July 18,1916.

end is asteadying device 8. The element 7 is in the form of a depending arm 9 having an apertured head 10 to fit the central beam 1, and projecting upwardly from the head is a handle 11 whereby the instrument can be conveniently manipulated. In the lower end of the depending member 9 may be arranged a pivot needle 12, or a guide shoe 13 may be applied to this arm so that by this shoe sliding on a straight edge or the like the instrument can be properly guided. The guiding and pivot element 7 is held fixedly in place by a set screw 14 in the head 10 binding on the beam 1. The steadying element 8 is a depending member removably clamped to the beam 1 and having at its bottom a ball or'equivalent device 15 whereby it can slide readily over the surface on which lines are to be drawn.

The marking devices may be ruling pens, pencil points or the like. In the present instance each marking device comprises a depending member 16 having at its top an apertured head 17 through which a beam extends, the fit being loose enough to permit the marking device to slide longitudinally or to swing on the beam. In the head 17 is a set screw 18 which is adapted to bind on the beam, and, if desired, each beam may have a longitudinal groove 19 into which the set screw engages when a marking device is in vertical or operative position. By loosening the set screw 18 a marking device can be swung to one side and held in such position by tightening the set screw 18, as will be clearly understood from Fig. 3. The pen 20 of the marking device may be of any desired construction, but in the present illustration form a sort of clutch for preventing the pen or marking device from turning during the use of the instrument, but the marking device can be readily turned by the operator about the axis of the stem 23.

When the instrument is in the condition shown in Fig. 1, a plurality of concentric circles can be drawn and the radii of the circles may be varied by longitudinally shifting the marking devices on their re spective beams. In this use of the device a pivot needle acts as the center of the circles and the steadying device 8 slides over the surface of the paper, thereby maintaining the beams parallel with the surface on which the circles are drawn, so that all the marking devices used will be equally effective. When straight parallel lines are to be drawn the shoe 13, shown in Fig. 4, is applied to the element 7 From the foregoing description taken in connection with the accompanying drawing, the advantages of the construction and method of operation will be readily understood by those skilled in the art to which the invention appertains, and while I have described the principle of operation, together with the device which I now consider to be the best embodiment thereof, I desire to have it understood that the device shown is merely illustrative and that such changes relation, and marking devices carried by the beams, whereby a plurality of parallel lines can be drawn.

2. A portable drafting instrument adapted to bear on and move over the surface to be marked, comprising a plurality of beams, bars connecting the beams together in fixed relation, and marking devices carried by the beams, whereby a plurality of parallel lines can be drawn, said marking devices being adjustable longitudinally of the respective beams.

3. A drafting instrument comprising a plurality of beams, bars connecting the beams together in fixed relation, marking devices carried by the beams, whereby a plurality of parallel lines can be drawn, said marking devices being adjustable longitudinally of the respective beams, a guide member mounted on one of the beams at a point outwardly from the marking devices, and a steadying device mounted on one of the beams at the side of the marking devices opposite from the guide member.

A. A drafting instrument of the class described comprising a plurality of parallel beams, bars extending transversely to and connected with the beams for holding them in fixed spaced relation, a guide member on the central beam, a steadying member mounted on the central beam, marking devices adjustable longitudinally of the beams and adapted to be swung from avertical operative position, and means for clamping each marking device on its respective beam in its operative or inoperative position.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

NILS PAULSEN.

Witnesses:

C. BRADWAY, PHILIP D. RoLLHAUs.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

- Washington, D. C. 

